161343959 has 4 divisors (see below), whose sum is σ = 184393104. Its totient is φ = 138294816.

The previous prime is 161343887. The next prime is 161343971. The reversal of 161343959 is 959343161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161343959 - 2¹² = 161339863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161343989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11524562 + ... + 11524575.

It is an arithmetic number, because the mean of its divisors is an integer number (46098276).

Almost surely, 2^161343959 is an apocalyptic number.

161343959 is a deficient number, since it is larger than the sum of its proper divisors (23049145).

161343959 is an equidigital number, since it uses as much as digits as its factorization.

161343959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23049144.

The product of its digits is 87480, while the sum is 41.

The square root of 161343959 is about 12702.1241924333. The cubic root of 161343959 is about 544.3993146158.

The spelling of 161343959 in words is "one hundred sixty-one million, three hundred forty-three thousand, nine hundred fifty-nine".